Skiving machine



sept. 14,1926. 1,599,491"l f w.T. B. EGBERTS smvma MACHINE Filed May 22 -1923 3 SheetSshet l 74 61 1 l'. 6J g /7 la] 6% I 55 Flgn 2o A`@ 58 l :I

#Sept 14 A 1926 1,599,49

w. T. a.v magma 3 Sheets- Shept 5 #VVE/WUR* .A Y Pieno. f www@ ma@ f lll Patented Sept.' 14, 1925.

UNITED srArEs issaiei PATENT oFFlcE.

WILLIAM'THOMASB'UCKINGHAM .ROBERTSL OF LEIGESFLER, ENGLAND, ASSIGNOR yTO UNITED SHOE 1Vl.ACI-I]IIY.\TERYr CORPORATION, OF PATERSON, NEW JERSEY, A COR- PORATION OF NEW JERSEY.

SKIVING MACHINE.

Application filed May 22, 1923, Serial No. 64,734, and in Great Britain .Tune 2, 1922.

This invention relates to skiving machines and is herein illustrated as embodied yin a machine for skiving the ends of strips of leather which are to be fastened together with the skived ends overlapping toform a length of belting in the manufacture of belts.

material are of varying widths which sometimes reach a maximuml of eight inches or more. It is`essential that these scarfs be accurately cut since, when the two'scarfed ends'are overlapped and fastened together so as to join two strips, the thickness of the joint should be uniform with the thickness of the solid portions of the strips, and there should be no ragged edges on the surface at the joint.

According to one feature of the invention novel and improved means are provided for presenting to the skiving Cutter the ends of the strips of material which are to be skived. The illustrative machine comprises a pair of feed rolls open at one end to provide space for the passage of the/body of the strip while the end thereof is being skived A knife extends obliquely across the gap between the rolls and is mounted for angular movement about an axis located'at thatend of the rolls which is remote from the open end. In front of the rolls is a `table or support for the end portion of the strip and a gage for the extreme end edge of the strip, means being provided for pushing sidewise to the rolls the end portion of the strip thus supported and guided. With this construction an extremely accurate scarf may be produced.

This and otherfeatures of theinvention, including certain details of construction and combinations of parts, will be describedas embodied in an illustrative machine and pointed out in the appended claims. i i

Referring now to the accompanying drawings i Figure l is a front elevation, partly broken away,r ofa machine in which the l present invention is embodied.

, Fig; 2 is a plan .view of the machine partly broken away.V y Fig. B is a side elevation of the machine.

The scarfs at the ends of these strips of" Fig. 4 is a part sectional elevation on the line 4 4 of Fig. 3.

Fig. 5 is a part sectional elevation on the line 5--5 of Fig. 4.

l Fig. 6 is a sectional detail of lmifecarry mg mechanism of the machine'.

Fig. 7 shows, to an'enlarged scale, a section of a comparatively soft piece of rial being operated upon.

Fig. is an end view of the mechanism shown in Fig 7. f f

Fig. 49 illustrates diagrammatically the operation of certain `parts of the machine mateupon a comparatively hard piece of matej rial; and i l Fig. l() shows sections of a piece of material after it` has been operated upon inthe machine. e y v The main frame l of the machine has bolted to it a horizontal table 2 along which the material to bescarfed or slrived is fed, by the operator, to the` feeding rolls. To enable the operator toA feed the material squarely to the rollsl and to force its leading edge between them' a plate 3 is slidingly mounted in a dove-tailed guideway formed in the table 2. The material may be the end of a wide piece ofbelting the bulk of which is rolled Vin acoil which is moved along its axis as itsend on the table, is movedlater ally on to the knife. The plate 3 "has at about the middle of it a lhandfpiece 4 by which the operator may lslide the plate 'towards or from the rolls and yal depending stop which, whenthe plate 3 ismofved towards the rolls, engages the rear end of a second groove in the table to limit the movement of the plate 3 towards the rolls. VThe plate ,at its rearend has fixed on it a transverse bar 6 having fixed on it two leaf springs 7,' which project beyondv the rear edge of the bar and beneath which the front edge `of thematerial is placed with its edge against the bar. n Theend of the material is placed against a vertical guide face, on an upper rollcarrying kframe 9,. to be herein? 1l, extending `from left to right of the .ma-

chine, rotatably mounted in bearings formed on a member 12 {iXed in the main frame. The upper edge of the lower roll 10 is slightlyahove the upper surface of the table 2 and its inner or right-hand end'bears against the guide tace 8 on the upper-roll- Carryin-g trainel" which face extends well rearward into the plane of .the rol-l axis and has let into it a hardened plate 116 (Fig. 5) fined by screws 117 to the trame 9 so as to guide the edge of the material as close' up to thelrnite as possible. The end of the roll at this' end isslghtly enlarged in diam' eter (about 1@) as shown at 13 (F ig. 7) and is" curved or'lared trom the smaller to the larger diameter for a purpose to be hereinafter described.

The upper roll 14 is knu'rlecl andis formed as a. sleeveiied by pn'ji (Fig. 4) to an enlarged portii'l/t a shaft 17. The roll i4 extends into a bearingin the uppererollcarrying frame 9 which traine is' ypin/oreal on a `shaft 148 (FigB) iiXed ninthe raine 1. The shaft'17 (Fig. 4)' at its right-hand end enters a bore in a sleeve 19 rotatably mounted in abush 2O iiXfed in the upper-rollearryng frames). The shaft if? can 'slide axially in the sleeve 19 and is keyed to `it toy rotate therewith.` lTo adjust the 'upper roll 14 axially the leftlhand end ofthe shaft i7 is reduced atei and basa' bearing in a sleeve 22 iXed in a depending portion of a slide23 mounted in a guideway formed in the upper-rell-carryng frame 'e above 'and parallel to the upperroll 14; The shaft 17 is held against endwi'semvement relative- 1y to fliegende by a washer '24 and M1125 on the end of Vthel 'reducedportion of 'the shaft 17 (at one end of the' sleeve 22,) and by theshoulder formed on the shaft 17 by the reduced portion 21 (at 'the other end of the sleeve). The slide V23 has liXed in it a handle 26 by which'the slide 23 and roll 14 may be moved endwi'se and carries a plunger 27 arranged' to enter oneof `a series of holes 28 formed in theupper-roll-carrying frame. The plunger 27 maybe raisedvby 'a hand lever 29, pivoted' on the handle '26, against the action eta spring 80. The holes 28 are halt an inch apart and are so arranged that a4 scart i'rom three and a half to eight and half inches varying byA half an inch rmay be cut, the width oi' scart varying by the distance'the Vupper roll 14 projects beyond the guide vface 8 on the'upperroll-carrying frame 9. The upper-roll-'carrying' frame 9 has a forwardly projecting arm '3l (Fig. 3) betweenl the lower side of which and the main trame is conned a `compression spring 32 whichy yields when thematerial enters between theV rolls. Movement ofthe upper roll 14 towards thelower 4roll under thein- `thience of the compression-spring y32,y'vlien there is fno material between 'the rolls,`.is limited by a! hand 'wheel 33 screwed Von to the upper end of a rod 34 which passes through the compression spring 82 and through the arm 31 of the upper roll frame Qand is fixed in the main frame 1. By adjusting' the hand wheel 33 the space between 'the rolls may be varied to suit the thicknessot the material. The `tension `olf the spring 82 may be adjusted by means ot a hand-wheel 35 `threaded on the lower end of the rod 34 on which hand-wheel the lower end of the spring 32 rests.

Between the inside tace of the depending bearing' onthes'lide 23 and vthe end face ot the upper roll 14is an adjustable plate 36 (Figs. 4 and 8). The plate 36 projects from it block 37 vertically adjustable over a farce 38 ig. 'on the 'rear ofthe slide 23 by a vertical screw 39 threaded into the block andv prevented from endwise movement by 'a lug 40 on the slide 23 which is engaged on one side bythehead 41 of the screw and on 'the ether 4'side by' a collar 42 on 4the screw. The block vis guided over the tace on the slide by 'a screw/'43 passing, through a vertical slot l44 (Fig. .7) in thev block7 into a threadedlhole' in the'slide. The head 41 oi the 'adjusting screw (39 has formed on it notches which are engaged by a spring pli'inger 445"carried in the slide 23 Ato prevent accidental rotation ofthe screw and to indicate the amount the block Vis adjusted when the screw is rotated. The plate 86 has iixed in it a hardened block 46 (Figs. 7, 8 and which is set, by means'ot the screw 39, a little below the 'lower surface oi the upper roll 14 so esto compress a portion et the material betweenthe block and the lower roll, which lower roll, when cutting` a scarf ofthe''greatest` width which the machine is designed to out, projects about'onehalt inch beyond the outer or lett hand end oi the upT `per roll. j The amount the lower roll projects beyondthefupper roll as the 'upperrolljis'adju'sted axiallyto out a scarf ofless width.

The 'lowerrollis actually formedin two partsE thepart 10 on which is formed the dared endl being tired to lthe shaft 11 by aflr'ey 47 7) whilea part 48 of the roll is removable' andv is connected to the part 10, soas to lrotate therewith7 by a. pin 49.

)Wien -operating upon comparatively soft material thebllocl; 46'will readily compress, for 'a purpose hereinafterdescribeth a portion of the .materallbetween itselil and the part48 othe lower roll, but it the material is' ci'npa'ratively hard ity will not be compressed so readily; and to assist in the dir# tortioir ol the work the part 48 of the lower roll 'may bebeveled 'as at 5'() (see Fig. 9). The highest rpart or" the beveled portion where it merges' 4'into the parallel portion of the part 48 is insuch a case, arranged to come Yin line with the inner tece'ot the block 46, and in order 4that this alinement maybe obtained, when the slide 23 is adjusted for the cutting of a different width of scarf, the part 48 is made detachable so that a similar Apart having its beveled portion positioned ^be distorted, the material outside the rolls being bent bodily down as shown in 9. The edge of the compressed or bent portion (as the case may be) defines the edge of the scarf where the knife edge 54a (see Fig. 7 8 and 9) extends out of the material; and, when the material passes from between vthe rolls,the compressed or bent portion expands or springs back with the resultlthat a sharply defined concavelycurved shoulder. or depression A. (Fig. 10) is formed at the inner edge of the scarf. In a similar manner the flared end 13 of the lower roll produces aiconvex opposite end B (Fig. 10) to i kthe scarf so that when two skived belt ends come to be cemented together they will mate properly with the convex outer margin of the 'scarf on the one piece seated snugly in the concave inner margin of the scarf on the other piece.

rlhe knife 54 has formed along each'side `a V groove, the groove on one side (the riggght-hand side as viewed in Fig. 1) being 'held against a V face 55 formed in a member 56 by a clamp 57 and screw 58. The cutting edge 54a of the knife is positioned in the member 56 by a plate 59 fixed on the member 56; and thrust on the knifeV due to the cutting of the scarf is resisted by an adjustable screw 60 threaded through a lug 61on the member 56 and bearing against a block 62 resting on the knife and having a lip 63 (liig. 8) engaging the back of the knife.

The member 56 is slidingly and rotatably mounted on a rod 64 (Figs. 2 and 6) which is fixed by screws 65 to an arcuate slide 66 rotatably mounted in a bracket 67 fixed by a bolt 68 (Fig. 3) to themain frame 1. The bracket 67 has formed on it a tongue 69 Y which fits ina groove 70 in the frame. rlhe The arcuate slide 66 is'prevented from endwise movement in the bracket 67 byv a block 71 5) positioned in a slot in the `arcuate slide, iixed by a screw 72 to the bracket 67.

bracket 74 fixed by screws 75 tothe bracket 67 holds the arcuate slide 66 on its seating in the bracket 67. rlhe screw 72v clamps the ,cap 73, block 71 and bracket 67 together,

vthe block being slightly thicker tlian the slide 66` soV as to allow movement of the slide. By removing the bolt 68 the bracket 67 and knife-carrying parts maybe removed bodily from the machine for the removal or replacing of theknife. The rod 64 is supbracket 74, on the rod.

A spring and knife in a clockwise direction (see Fig. 6) about the axis of the slide. The spring 76 is connected at oneend to a bent rod 77 fixed in a lug 78 projecting from the bracket 67l and at the other end to a hook fixed in which is engaged by a roll 101 76 tends to swing theV slide 66 ,75 ported at its left-hand end during the cut* ting by a face (F i0: 2) formed on the a block 79 slidingly mounted in a bore inthe y rod 64. A screw 8O` having fixed to it a hand-wheel 81 is threaded through the block 79 and is prevented'from endwise movement in the shaft 64 so that when the screw is rotated the block 79 is moved axially of the shaft to vary the tension of the spring 76.

The right-hand end (Fig. 7) of the cutting edge of the knife is supported on the ynarrow upper face of a slide 82 adjustable1 vertically to vary the position of the knife edge at the point supported the slide in relation to the upper edge of the bottom roll and thus to vary the thickness of the skived pins may be inserted,` sothat the shaft may y Vbereadily adjusted between two predetermined positions ii' desired.` e. plate 89is fixed on 'the bracket 88 to guide downwardly out of thel machine the skived material. l

The spring 76 holds the lower surface of the knife near its edge against the slide 82 and holds the upper surface of the knife at its left-hand end, `near its edge, against a `face on the under surface of the block 46 (but a little higherthan the portion of the `block which bears on the work) so that the active portion of the knife edge 54'nl oc? in Fig; 7 and when the upper roll is adjustedaxially for a different width of scarf,

or when the upper roll is raised Vbyfthe en- A cap 73 extending from a tranceof the work between the rolls, the

angle or the knifev edge will vary according Fui the upper roll.` Willen it is 'desired' to reinovethe bracket 67 andknife from the machine the pressure ol the kniie against the block at@ shouldI be relieved to prevent daing agey to theknife or to the operator' by the sudden sivinging oi the'lrnife about theaxis or the sli'ded under fth'e iiilluence off the spring` 7h; fand, for this purpose, a hand? lever 189 (Fig. (i) is pivoted at 90 vto the bracket 67.' 'ithe handlevcr carries a roll 91 Whiclnwvhen thehand lever is swung into the position shown in Fig'. (5, hears-'against the underside of? thel rod 64r- 'ivliich is thus prevei'l'ted from swinging movement-- under the action ot' the' spring 76: 'loensure `that the lever 189 shalli have-been-inove'd into this positionl before the bracket 67 can be removed, the lever has formed on it segnient 92' which, when the bracket is lixed in the'maehine and the lever is movedy to allow thespring 76 tos-vingtli'e'knif'e intoI en'- gageinent with thebloc'k 46; enters al slot in a lug 93 on the trame l. j

The segment is so JformedI that it is not 'removable lronrthe slot in the lug until the pressure of' the kniite on .the block' lllras been ielieved rllhe hand-lever 189 is held in this posit-ion against a stop fac-el on the bracket-6T by the tension of the spring 76 acting' on the roili 91 through the rod 64, the roll having moved just over the dead center. l'lhen` the b 'acket is replaced the engagementV oi' the'segment and slot correctly positions the bracket in tliemachine.

When the upper roll 141 is adjusted axially by means ot the slide 281 to 'vary the Width of the scarf, the knife is sinniltaneouslyV and correspondingly adjusted. For this purpose the member 56 (Fig. 2) is providedl with a seating and cap for one end ofV al ball-ended link 9drthe other end of which is seated in one end of an arm 95 the other end of which is mounted on a reduced portion 96 of the shaft 17. The reduced portion 96 is free to rotate in the arm7 andthe arm is confined axially of the shaft between the shoulder formedl by the reduced portion 96 and a- Washer 97 iiX'ed on the end of the shaft by a screw 98 so that the arm 95 moves with the shalt' when it is movedg axially and through the halllended link 94 causes the knife-carrying member V56 to slide axially on the rod 611. The arm 95 is prevented from swinging about the reduced portion 96 by a guide rod (not shown) fixed in the frame 1 and passing through the arm 95'. TWhen adjusting the top roll and knife it ist advisable to relieve the pressure of the knife'onthe block 46 by means ofthe hand'- lever 189 and toallow the knife to take up liand endl oli-v the kniie'is never'exposed substantially beyond the block 16 as'v would be l the case, -Wh'encutting narrowscarfsf, it' the knifel didi notV thus' move with the rol-lV and injury to the `operator by an exposed' knite is in this: Way prevented. The knife at its right-hand end beyond the slide 821 is' received in'= an vopening 9'9f(l3`i g. 5)- in the upper-#roll-eairrying trame 9. To `preventthe operators fi :fers iir'onr being drawn 'between the upper ai c lower rolls 'atelescopic guard compri-singtivof hars liked respectiveljf to the Jface 8- ot'fthe member-'I9 and vto the bearingg` for' the reduced fendi 21 off the shaft i? isL provided.

vFixed for `toi-med on the sleeve- 195 isV a pinion 102 which meshesl'wifth pinion' 19B rotatably lroount-ed' on a stud 104: liked: in the traine. 'lllie` pinion- 4103' mesheswith a io'n 195 rotatablyinouirterhon: a: studplG lined' in the 1 and meshing" Withthis ylatter pinion is a pinion 1.0.7 Lloeyedl Ltov the lower roll shalt 11.- rlhe arrangement ol' these pinions (eee is such that .as the upper and lowerl rollsare-separatedf hy the insertion of ""ie inate'riall'between them there is n'o disengagement oi the' teeth off any off? the pinions.

` Fixed oir theeleeve 19 is. 'a Wornwvheel 108 which is` driven by a Worin 199 fixed on a shaft 110 rotatably mounted? in *bearings loi-ined on aguard (a portion of which isshmvi'i at .lll'fliA 11)' Whiehencloses the pi-nionsf.` Worlnevvheelrand Worin'. The sha'iit 119' ycarries 'ast'antl looe pulleys 1112, 1143 by which the `in'at'l'iii'ie is driven.

ln the operation 'off the machine', the Vend 4portion ot a* strip ot sheet material such yas helting 1s placedl upon the support 2 with its endf in Contact with the guide 8. llle pusherfG is their innnbpulatecl topresenit the lend' portion'l ot the strip sifd'eivise to the rolls 10; The lelthnnd end. ot' the rolls, as viewed in Figs. lf and'. i". is open so that a free and unobstructed space is provided Vfor the passage of the: body' of" the strip while the' endl port-ron is being `skived'j the 1 kni'iieedge 511 being inclined' downwardly aci'ossthe gap between the rolls from the outer 'loiverino'st portion of that rollv which 'farthest 'from the .plane of' the support `(the upper` roll) to lthe inner uppermost `portion of the other' roll'.4 As the skiving takes place thestrip isrhentalong the lines in which the knrte emerges `from the surtace, the member fit and the Iflared inner endvoithe lower roll producing' these bends. i

vwith the result that thel scarf takes the torni shown. ini Fig. 10.v

Althoiigh the invention hasheen settortli as embodied in a particular" machina it should? he understood that the infveiition is lll() i tn Cir

point on the other roll, one of said rolls and the knife being` adjustable in the direc-tion of extent of the axis of the roll, and vconnections between the'two such thatv adjust,-

k ment of. the roll adjusts the knife.

l0. A machine. for skiving the end portion of av strip of sheet material" having, 1n combination, a support for the strip, a pair of feed rolls one of which is farther from the support than the-other,'sai.d rolls being' capa-ble of relative movement of separation and approach, there being a `free and unobstructedspace at one end of the rolls to permit passage of the body of the strip while the end thereof isbeing skived, a knife the c nections between said knife and roll' such that adjustment ofv the roll adjusts the knife in the same direction.

l1. A machine of the class described 'havinlg, in con'ibination,` a pair of feed rolls adapted to advance a piece of sheet mat-eriah a knife extending obliquely a-crossthe path of the materia-l in position tocut it on an angle and means torbending the material along a line in which .the knife intere sects the material., said means comprising- .a cut-away port-ion on 'one roll and al cooperating rigidi member extending beyond the periphery .of the other roll. Y

12; A Vmachine'for skivingthe end portion of a strip of sheet material having, in combination, a pair offeed rolls, a knife .having its edge eatending obliquely across the gap between the rolls, there being at one end of the rolls a free and unobstructed space for the passage of the body portion of the inaterial,y means whereby' one-'roll maybe adjust-ed in the direction of extent of its axis, and means for distorting the material at the localities engaged byone Yendof one roll and by the opposite end ofthe other roll. l 13. A machine of the class described hav'- ing, in combination, a pair of feed'rolls .one of which is ladjustable in the directions of ext-ent of its axis, the gap between the rolls beingopen fat its outer end to permitfree passage of the body portion of the work, and a knife inclined across the roll .gap from the `outer end of `the adjustable roll tothe inner end of the other roll, said knife ,tially the same.

beinginountedfor angular movement about an `airis which is parallel to the direction of feed movement, and for bodily adjustment in a path-parallel to that of the upper roll, the construction and arrangement being` such that `adjustment lof the adjustable roll adj-uststhe knife bodily while the location of the' axisof inclination of the knife 1remains' unchanged.

141A machine of the class described having, in combination, pair of feedhv rolls one of which'isl adjustable inthe directions of extent of its axis, the gap between the rolls being open atits outer end to permit free vpassage of the body portion of the werk, and a knife inclined across the roll gap from the outer'end of the adjustable roll to the inner end of the other roll, `said knife 'being mountedfor 'angular movement about an axis which is parallel to the direction 'of feed movement and is siiibstantially tangential zto the upper innermost point on the peripheryY of said other roll, and for bodily adjustment in a path parallel to that ofthe upper roll, the'constriiction and arrangement being such that adjustment of the adjustable roll adjusts'the knife bodily while the location of the airis' of inclination ofthe knife remains unchanged.` L

' 15. A machine 'for skiving the end or a strip'fof sheet material having, in combination, a supportkfor the' end of the strip, an inclined knife to whichl the strip is fed sidewise, and means for bending the strip downwardly at the locality in which the up# perportion'ofr the knife emerges from the strip and for' bendingthe strip yupw irdly at the locality in which the lower portion of the knife emerges from the strip so as to produce `a scarf having a concave shoulder along' its base' and a convexedge.

16.`A' machine for skiving' the end 'of a strip of sheet material having, in combination, a rsupport'for the end of the strip, an inclined knife to which the strip is fed sidewise, and" means for bending the strip downwardly at the locality in which the upper portion oftheknife emerges from the strip Land for bending the strip upwardly at the locality inwhich the lower portion of the knife emerges from the strip so as to produce a scarf having,` a concave shoulder along .its base and a convex edge, the extent of the bending' being such that the. curves of the shoulder .and of the edge are'substan- In testimony whereof I have signedA my name to this specification.

i `WlLLL/lll"THDVIVAS BUCK'lNGHAM EGBERTS 

